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Finding the Fourth Proportional to 148.58, 204.95 and 98.79

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Solution

The fourth proportional to 148.58, 204.95 and 98.79 is: 136.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    148.58 : 204.95 = 98.79 : x
  2. Step 2: Convert to fraction form
    148.58/204.95 = 98.79/x
  3. Step 3: Cross multiply
    148.58x = 204.95 × 98.79
  4. Step 4: Simplify right side
    148.58x = 20,246.52
  5. Step 5: Solve for x
    x = 20,246.52/148.58
  6. Step 6: Final answer
    x = 136.26

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.